ORCA-C/Tests/Spec.Conform/SPC17.2.0.3.CC

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/* */
/* Special Conformance Test 17.2.0.3: Verification of freopen */
/* */
/* Other files needed: spc17.2.0.a - spc17.2.0.d - data files for the test */
/* */
/* Tester needs to verify that the files named spc17.2.0.a - spc17.2.0.d, */
/* and located on the work prefix, have previously been created with the */
/* test Special Conformance 17.2.0.2. */
/* */
/* The first action of the test will be to open spc17.2.0.a, and print its */
/* contents on the screen. The tester needs to verify that the contents are */
/* correct. */
/* */
/* The next action is to verify that standard input is working. The tester */
/* will be prompted for a string; this string will then be written to both */
/* standard out and standard error out. The tester needs to verify that the */
/* output strings are correct. */
/* */
/* The test will then redirect standard in, standard out, and standard error */
/* out. The contents of spc17.2.0.b will be sent to the files spc17.0.c, */
/* the new standard out, and spc17.2.0.d, the new standard error out. The */
/* tester needs to verify that the three files are identical. */
/* */
/* Finally, standard in, standard out, and standard error out will be reset */
/* to their original values. The tester will be prompted for a new string */
/* to be entered from the keyboard. The tester needs to verify that the */
/* string is correctly echoed to the screen twice (once for standard out and */
/* once for standard error out). */
/* */
#include <stdlib.h>
#include <stdio.h>
main ()
{
int i, j;
char s [255]; /* input buffer */
FILE *f1, *f2, *f3, *f4;
FILE *saveStdin, *saveStdout, *saveStderr;
char fn1 [14] = "3/spc17.2.0.a"; /* define filenames */
char fn2 [14] = "3/spc17.2.0.b";
char fn3 [14] = "3/spc17.2.0.c";
char fn4 [14] = "3/spc17.2.0.d";
f1 = fopen (fn1, "r"); /* open for reading */
if (f1 == NULL)
goto Fail;
i = 0;
while ((j = fgetc (f1)) != EOF) /* read successive */
s [i++] = (char) j; /* chars into string */
s [i] = '\0';
printf ("This is the contents of 3/spc17.2.0.a:\n%s\n", s);
f1 = freopen (fn2, "a+", f1); /* reassign file pointer */
if (f1 == NULL)
goto Fail2;
i = fseek (f1, 0L, SEEK_END); /* move to end of file */
if (i)
goto Fail5;
i = fputs ("This is the second line of file 3/spc17.2.0.b", f1);
if (i == EOF)
goto Fail3;
rewind (f1);
i = 0;
while ((j = fgetc (f1)) != EOF) /* read successive */
s [i++] = (char) j; /* chars into string */
s [i] = '\0';
printf ("\nThese are the updated contents of 3/spc17.2.0.b:\n%s\n", s);
/* This part of the test verifies reopening standard in, standard out, and */
/* standard error out. */
printf ("Please enter a string\n"); /* 1st verify that standard in */
j = 0; /* standard out and standard */
while ((i = fgetc (stdin)) != '\n') /* error out work */
{
if (i == EOF)
goto Fail7;
s [j++] = i;
}
s [j] = '\0';
printf ("The string entered is:\n");
i = fputs (s, stdout);
if (i)
goto Fail8;
printf ("\n");
i = fputs (s, stderr);
if (i)
goto Fail9;
printf ("\n");
saveStdin = stdin;
stdin = freopen (fn1, "r", f1); /* reassign standard in */
if (stdin == NULL)
goto Fail2;
f3 = fopen (fn3, "w"); /* open stream to get new FILE ptr */
if (f3 == NULL)
goto Fail;
saveStdout = stdout;
stdout = freopen (fn3, "w", f3); /* reassign standard out */
if (stdout == NULL)
goto Fail2;
saveStderr = stderr;
f4 = fopen (fn4, "w"); /* open stream to get new FILE ptr */
if (f4 == NULL)
goto Fail;
stderr = freopen (fn4, "w", f4); /* reassign standard error */
if (stderr == NULL)
goto Fail2;
i = fscanf (stdin, "%s", s); /* read input string from file */
if (i == EOF)
goto Fail7;
i = puts (s); /* write string to files */
if (i)
goto Fail8;
i = fputs (s, stderr);
if (i)
goto Fail9;
/* Now reset standard in, standard out, and standard error, and ensure */
/* they're ok. */
i = fclose (stdin); /* close disk files attached */
if (i == EOF) /* to stdin, stdout, stderr */
goto Fail4;
i = fclose (stdout);
if (i == EOF)
goto Fail4;
i = fclose (stderr);
if (i == EOF)
goto Fail4;
stdin = saveStdin; /* reassign standard in */
stdout = saveStdout; /* reassign standard out */
stderr = saveStderr; /* reassign standard error */
printf ("Please enter a string\n"); /* Prompt the tester to input */
j = 0; /* a string & then check that*/
while ((i = fgetc (stdin)) != '\n') /* it's written to stdout & */
{ /* stderr */
if (i == EOF)
goto Fail7;
s [j++] = i;
}
s [j] = '\0';
printf ("The string entered is:\n");
i = puts (s);
if (i)
goto Fail8;
printf ("\n");
i = fputs (s, stderr);
if (i)
goto Fail9;
printf ("\n");
printf ("Passed Special Conformance Test 17.2.0.3 ");
return;
Fail:
perror ("File open failure in Special Conformance Test 17.2.0.3 ");
exit (0);
Fail2:
printf ("Error when reopening stream\n");
exit (0);
Fail3:
printf ("Error when writing file\n");
exit (0);
Fail4:
printf ("Error when closing file\n");
exit (0);
Fail5:
printf ("Error when seeking file\n");
exit (0);
Fail6:
printf ("Error when appending to file\n");
exit (0);
Fail7:
printf ("Error when reading from standard in\n");
exit (0);
Fail8:
printf ("Error when writing to standard out\n");
exit (0);
Fail9:
printf ("Error when writing to standard error out\n");
exit (0);
}